CN210853000U - Double-shaft solar wing spreading mechanism - Google Patents
Double-shaft solar wing spreading mechanism Download PDFInfo
- Publication number
- CN210853000U CN210853000U CN201921702753.1U CN201921702753U CN210853000U CN 210853000 U CN210853000 U CN 210853000U CN 201921702753 U CN201921702753 U CN 201921702753U CN 210853000 U CN210853000 U CN 210853000U
- Authority
- CN
- China
- Prior art keywords
- mounting plate
- section
- gear
- flat shaft
- hinge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pivots And Pivotal Connections (AREA)
Abstract
The utility model relates to a space satellite device field, concretely relates to sun wing spreading mechanism. A dual-axis solar span opening mechanism, comprising: the device comprises a male hinge, a female hinge, a support frame, a gear A, a gear B, a torsion spring, a T-shaped cold welding prevention sleeve, an annular gasket, a disc spring and a damping nut. The utility model discloses a sun wing spreading mechanism compact structure occupies that the sun wing surface cloth piece area is little. The utility model discloses a dish spring and damping nut's setting produces rotary damping and makes deployment mechanism can not form the instantaneous impact in the deployment process development state is steady. The utility model discloses the two meshing gears that set up can make the expansion of public hinge and female hinge synchronous. The utility model discloses set up the bellying on public hinge and female hinge, can utilize the vacuum cold welding effect to accomplish the locking function between public hinge and the female hinge simultaneously with the restriction angle of expansion.
Description
Technical Field
The utility model relates to a space satellite device field, concretely relates to sun wing spreading mechanism.
Background
The solar wing is a device for collecting solar energy and supplying energy to the space satellite, and is an energy source of the space satellite. The space satellite is limited by a carrying space in a launching state, the solar wings are required to be folded and collected on the side walls of the satellite in a launching stage, and the solar wings of the satellite are unfolded into a plane shape after the satellite is separated from the rocket.
The unfolding mechanism of the satellite solar wing plays an important role in the launching and running processes of the satellite, the unfolding of the solar wing is a very important link for the satellite to enter a real working state, if the solar wing cannot be unfolded, the satellite loses working capacity due to gradual reduction of residual energy of a battery, and the service life of the satellite in orbit flight is further seriously influenced, so that the unfolding mechanism of the satellite solar wing is a key component for ensuring the normal running of the satellite.
The common solar wing spreading mechanisms at present are divided into two types: the active and passive solar wing mechanism is generally used as a repeatable folding and unlocking type solar wing mechanism, is applied to a large satellite more frequently, is driven by a motor generally, but consumes power resources and has a more complex structure.
For the microsatellite, the solar wing is usually unfolded by adopting passive driving, the solar wing is usually driven by a spring, the spring is pre-stressed to store potential energy of the spring during folding, and after the mechanism is unlocked, the spring releases the elastic potential energy to realize unfolding of the mechanism. The spring driving mode has the advantages of relative independence of the system and higher reliability. However, the driving force driven by the spring is not easy to control, and strong collision between adjacent solar wing panels is easily caused at the moment when the stretching is finished, so that the stretching process is uncontrollable, the stability of the locking and releasing process is poor, and the synchronous unfolding is uncontrollable. Meanwhile, the vacuum cold welding effect exists in a vacuum environment, so that the moving part also needs to be provided with a means for preventing the vacuum cold welding.
Therefore, the design of the solar wing spreading mechanism which has the advantages of simple structure, stable spreading and releasing process, synchronous and smooth spreading and capability of preventing the vacuum cold welding effect from being generated is particularly important for the microsatellite.
Disclosure of Invention
Therefore, the utility model discloses just make in view of above problem, the utility model aims to provide a simple structure, it is steady to launch the release process, launches synchronous smooth and easy and have the sun wing that prevents the vacuum cold welding effect and produce and open the mechanism, and this utility model realizes through following technical scheme.
A dual-axis solar span opening mechanism, comprising: the device comprises a male hinge, a female hinge, a support frame, a gear, a torsion spring, a T-shaped cold welding prevention sleeve, an annular gasket, a disc spring and a damping nut;
the solar wing installation structure comprises a male hinge, a mounting plate, a limiting bulge A, a horizontal limiting groove and a cylindrical limiting section A, wherein the male hinge is in an inverted U-shaped plate shape and is made of titanium alloy, two through holes are formed in the mounting plate on the left side of the male hinge and are used for being connected with a solar wing, the limiting bulge A is arranged on the upper portion of the right side of the male hinge, the horizontal limiting groove is arranged below the limiting bulge A, and the cylindrical limiting section A, the flat;
the solar wing sun block is characterized in that the female hinge is in an inverted U-shaped plate shape and is made of titanium alloy, two through holes are formed in the mounting plate on the right side of the female hinge and are used for being connected with a solar wing, a limiting protrusion B is arranged on the upper portion of the left side of the female hinge, a horizontal limiting groove is formed below the limiting protrusion B, and a cylindrical limiting section B, a flat shaft section B and a threaded section B are sequentially arranged at the lower end of the left side of the female hinge;
the supporting frame is made of ceramic materials and consists of an upper mounting plate, a lower mounting plate and fixing plates, wherein the upper mounting plate and the lower mounting plate are horizontally arranged from top to bottom, the fixing plates are arranged on two sides of the upper mounting plate and the lower mounting plate, the upper mounting plate is provided with two mounting holes which are distributed left and right, the circle centers of the two mounting holes are on the same straight line, the lower mounting plate is provided with two mounting holes which are distributed left and right, the circle centers of the two mounting holes are on the same straight line, the mounting hole on the left side of the upper mounting plate is coaxial with the mounting hole on the left side of the lower mounting plate, the mounting hole on the right side of the upper mounting plate is coaxial with the mounting hole on;
the flat shaft section A on the male hinge is arranged on the left side of the supporting frame and is positioned in the mounting holes formed in the left sides of the upper mounting plate and the lower mounting plate, the limiting section A is positioned on the top surface of the upper mounting plate, the flat shaft section B on the female hinge is arranged on the right side of the supporting frame and is positioned in the mounting holes formed in the right sides of the upper mounting plate and the lower mounting plate, and the limiting section B is positioned on the top surface of the mounting plate;
the gear A is made of ceramic materials and is sleeved on the flat shaft section A and positioned between the upper mounting plate and the lower mounting plate, and the gear A synchronously rotates along with the flat shaft section A;
the gear B is made of ceramic materials and is sleeved on the flat shaft section B and positioned between the upper mounting plate and the lower mounting plate, and the gear B synchronously rotates along with the flat shaft section B;
the gear A and the gear B are mutually meshed;
the torsion spring is made of spring steel, the torsion spring is sleeved on the torsion spring mounting section, and the extending parts at two ends of the torsion spring are respectively positioned in the limiting groove arranged on the male hinge and the limiting groove arranged on the female hinge;
the T-shaped cold-welding-preventing sleeves are made of polytetrafluoroethylene, and two T-shaped cold-welding-preventing sleeves are sleeved on the flat shaft section A and the flat shaft section B respectively and are located below the lower mounting plate;
twelve annular gaskets are made of polytetrafluoroethylene, two of the annular gaskets are respectively sleeved on the flat shaft section A and the flat shaft section B and are respectively positioned between the limiting section A and the upper mounting plate and between the limiting section B and the upper mounting plate, four of the annular gaskets are sleeved on the flat shaft section A and the flat shaft section B in pairs and are positioned at two ends of the gear A and the gear B, and three of the other six annular gaskets are respectively sleeved on the two T-shaped cold-proof welding sleeves;
six disc springs are made of spring steel, and the three disc springs are respectively sleeved on the two T-shaped cold-proof welding sleeves and are arranged in a staggered mode with annular gaskets sleeved on the T-shaped cold-proof welding sleeves;
the damping nut is two in quantity and is respectively installed on the thread section A and the thread section B, the lower portion of the damping nut is a thread access section, and the upper portion of the damping nut is provided with a press-in section.
The utility model discloses beneficial effect:
the solar wing spreading mechanism of the utility model has compact structure and small area of the cloth piece occupying the surface of the solar wing;
the utility model generates rotary damping through the arrangement of the disc spring and the damping nut, so that the unfolding mechanism can not form instantaneous impact when the unfolding state is stable in the unfolding process;
the double-meshing gear provided by the utility model can lead the expansion of the male hinge and the female hinge to be synchronous;
the utility model is provided with the annular gasket and the cold welding prevention sleeve between the contact surfaces of the movable parts, which can effectively prevent the vacuum cold welding effect;
the utility model discloses set up the bellying on public hinge and female hinge, can utilize the vacuum cold welding effect to accomplish the locking function between public hinge and the female hinge simultaneously with the restriction angle of expansion.
Drawings
Fig. 1 is a male hinge pattern.
Fig. 2 is a view of a female hinge.
Fig. 3 is a structural view of the support frame.
Fig. 4 is a front view of the deployment mechanism.
Fig. 5 is an exploded view of the deployment mechanism.
Fig. 6 is a view showing the structure of the damping nut.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are easily implemented by those having ordinary skill in the art to which the present invention pertains. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In addition, for the purpose of more clearly describing the present invention, parts not connected with the present invention will be omitted from the drawings.
As shown in fig. 1 to 6, a two-axis solar span opening mechanism includes: the device comprises a male hinge 100, a female hinge 200, a support frame 300, a gear A410, a gear B420, a torsion spring 500, a T-shaped cold welding prevention sleeve 600, an annular gasket 700, a disc spring 800 and a damping nut 900;
as shown in fig. 1, the male hinge 100 is an inverted U-shaped plate made of titanium alloy, the left side of the male hinge 100 is provided with two through holes for connecting with the solar wing, the upper part of the right side of the male hinge 100 is provided with a limit projection a101, the inner side of the limit projection a101 is an arc transition surface, the outer side of the arc transition surface is a vertical surface, a horizontal limit groove is arranged below the limit projection a, the lower end of the right side of the male hinge 100 is sequentially provided with a cylindrical limit section a102, a flat shaft section a103 and a threaded section a104, and the cross section of the limit section a102 is larger than that of the;
as shown in fig. 2, the female hinge 200 is an inverted U-shaped plate made of titanium alloy, the right side of the female hinge 200 is provided with two through holes for connecting with the solar wing, the upper part of the left side of the female hinge 200 is provided with a limit bulge B201, the inner side of the limit bulge B201 is an arc transition surface, the outer side of the arc transition surface is a vertical surface, a horizontal limit groove is arranged below the limit bulge B201, the lower end of the left side of the female hinge 200 is sequentially provided with a cylindrical limit section B202, a flat shaft section B203 and a thread section B204, and the section of the limit section B202 is larger than that of the flat shaft;
as shown in fig. 3, the supporting frame 300 is made of ceramic, the supporting frame 300 is composed of an upper mounting plate 301 and a lower mounting plate 302 which are horizontally arranged from top to bottom, and fixing plates arranged on two sides of the upper mounting plate 301 and the lower mounting plate 302, the upper mounting plate 301 is provided with two mounting holes which are distributed left and right, the circle centers of the two mounting holes are on the same straight line, the lower mounting plate 302 is provided with two mounting holes which are distributed left and right, the circle centers of the two mounting holes are on the same straight line, the left mounting hole of the upper mounting plate 301 is coaxial with the left mounting hole of the lower mounting plate 302, the right mounting hole of the upper mounting plate 301 is coaxial with the right mounting hole of the lower mounting plate 302, one side of the two mounting holes of the upper mounting plate 301 is provided with a;
as shown in fig. 1 to 5, the flat shaft section a103 on the male hinge 100 is installed on the left side of the support frame 300 and located in the installation holes arranged on the left sides of the upper installation plate 301 and the lower installation plate 302, the limit section a102 is located on the top surface of the upper installation plate 301, the flat shaft section B203 on the female hinge 200 is installed on the right side of the support frame 300 and located in the installation holes arranged on the right sides of the upper installation plate 301 and the lower installation plate 302, and the limit section B202 is located on the top surface of the installation plate 301;
as shown in fig. 4 and 5, the gear a410 is made of ceramic, the gear a410 is sleeved on the flat shaft section a103 and is located between the upper mounting plate 301 and the lower mounting plate 302, and the gear a410 rotates synchronously with the flat shaft section a 103;
as shown in fig. 4 and 5, the gear B420 is made of ceramic, the gear B420 is sleeved on the flat shaft section B203 and is located between the upper mounting plate 301 and the lower mounting plate 302, and the gear B420 rotates synchronously with the flat shaft section B203;
as shown in fig. 4, the gear a410 and the gear B420 are engaged with each other;
as shown in fig. 4 and 5, the torsion spring 500 is made of spring steel, two ends of the torsion spring 500 are provided with extending portions, a gap is left between coils of the torsion spring 500 to prevent cold welding, the torsion spring 500 is sleeved on the torsion spring mounting section 303, and the extending portions of the two ends of the torsion spring 500 are respectively located in a limiting groove arranged on the male hinge 100 and a limiting groove arranged on the female hinge 200 to prevent the torsion spring 500 from being unstable;
as shown in fig. 4 and 5, the T-shaped cold-welding-preventing sleeves 600 are made of polytetrafluoroethylene, and two of the T-shaped cold-welding-preventing sleeves 600 are respectively sleeved on the flat shaft section a103 and the flat shaft section B203 and are located below the lower mounting plate 302;
as shown in fig. 4 and 5, the number of the annular gaskets 700 is twelve, and the annular gaskets 700 are made of polytetrafluoroethylene, wherein two annular gaskets 700 are respectively sleeved on the flat shaft section a103 and the flat shaft section B203 and are respectively located between the limiting section a102 and the upper mounting plate 301 and between the limiting section B202 and the upper mounting plate 301, wherein four annular gaskets 700 are respectively sleeved on the flat shaft section a103 and the flat shaft section B203 in pairs and are located at two ends of the gear a410 and the gear B420, and three groups of six annular gaskets 700 are respectively sleeved on two T-shaped cold-proof welding sleeves 600;
as shown in fig. 4 and 5, the number of the disc springs 800 is six, and the disc springs are made of spring steel, and a group of three six disc springs 800 are respectively sleeved on the two T-shaped cold-welding-preventing sleeves 600 and are arranged in a staggered manner with the annular gaskets 700 sleeved on the T-shaped cold-welding-preventing sleeves 600, so that cold welding between adjacent disc springs can be prevented, and cold welding between the disc springs and adjacent metal parts can be prevented;
as shown in fig. 4, 5, and 6, two damping nuts 900 are respectively installed on the threaded section a104 and the threaded section B204, the lower part of the damping nut 900 is a threaded connection section 901, the upper part of the damping nut 900 is provided with a press-in section 902, the damping nut 900 is screwed in through the threaded connection section 901 to a certain depth, and the press-in section 902 forms a certain pressure to the disc spring 800 to generate rotational damping, so that the torsion spring 500 is unfolded smoothly and slowly without transient impact;
as shown in fig. 1-6, when the male hinge 100 and the female hinge 200 are unfolded under the action of the torsion spring 500, because the gear a410 is meshed with the gear B420, the flat shaft section a103 and the flat shaft section B203 rotate synchronously, the unfolding processes of the male hinge 100 and the female hinge 200 are synchronous, when the unfolding angle of the male hinge 100 and the female hinge 200 reaches 180 degrees, the convex part a101 is abutted against the convex part B201, the unfolding process is stopped, and the contact surface between the male hinge 100 and the female hinge 200 is cold-welded by using the vacuum cold-welding effect, so that the locking function between the male hinge 100 and the female hinge 200 is completed;
according to this embodiment, a housing may be disposed outside the sun wing opening mechanism support frame 300 and fixed by a housing fixing rod 304.
The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (6)
1. A dual-axis solar span opening mechanism, comprising: the device comprises a male hinge (100), a female hinge (200), a support frame (300), a gear A (410), a gear B (420), a torsion spring (500), a T-shaped cold welding prevention sleeve (600), an annular gasket (700), a disc spring (800) and a damping nut (900);
the method is characterized in that: the solar wing installation structure is characterized in that the male hinge (100) is in an inverted U-shaped plate shape and is made of titanium alloy, two through holes are formed in the installation plate on the left side of the male hinge (100) and are used for being connected with a solar wing, a limiting bulge A (101) is arranged on the upper portion of the right side of the male hinge (100), a horizontal limiting groove is formed below the limiting bulge A (101), and a cylindrical limiting section A (102), a flat shaft section A (103) and a threaded section A (104) are sequentially arranged at the lower end of the right side of the male hinge (100;
the solar wing sun protection device is characterized in that the female hinge (200) is in an inverted U-shaped plate shape and is made of titanium alloy, the right side of the female hinge (200) is provided with an installation plate which is provided with two through holes for being connected with a solar wing, the upper part of the left side of the female hinge (200) is provided with a limiting bulge B (201), a horizontal limiting groove is arranged below the limiting bulge B (201), and the lower end of the left side of the female hinge (200) is sequentially provided with a cylindrical limiting section B (202), a flat shaft section B (203) and a thread section B (;
the supporting frame (300) is made of ceramic materials, the supporting frame (300) is composed of an upper mounting plate (301) and a lower mounting plate (302) which are horizontally arranged from top to bottom and fixing plates arranged on two sides of the upper mounting plate (301) and the lower mounting plate (302), the upper mounting plate (301) is provided with two mounting holes distributed left and right, the circle centers of the two mounting holes are on the same straight line, the lower mounting plate (302) is provided with two mounting holes distributed left and right, the circle centers of the two mounting holes are on the same straight line, the left mounting hole of the upper mounting plate (301) is coaxial with the left mounting hole of the lower mounting plate (302), the right mounting hole of the upper mounting plate (301) is coaxial with the right mounting hole of the lower mounting plate (302), one side of the two mounting holes of the upper mounting plate (301) is provided with a torsion spring mounting section (303), and a shell fixing rod;
the flat shaft section A (103) on the male hinge (100) is arranged on the left side of the support frame (300) and is positioned in mounting holes formed in the left sides of the upper mounting plate (301) and the lower mounting plate (302), the limiting section A (102) is positioned on the top surface of the upper mounting plate (301), the flat shaft section B (203) on the female hinge (200) is arranged on the right side of the support frame (300) and is positioned in the mounting holes formed in the right sides of the upper mounting plate (301) and the lower mounting plate (302), and the limiting section B (202) is positioned on the top surface of the mounting plate (301);
the gear A (410) is made of ceramic materials, the gear A (410) is sleeved on the flat shaft section A (103) and located between the upper mounting plate (301) and the lower mounting plate (302), and the gear A (410) rotates synchronously with the flat shaft section A (103);
the gear B (420) is made of ceramic materials, the gear B (420) is sleeved on the flat shaft section B (203) and located between the upper mounting plate (301) and the lower mounting plate (302), and the gear B (420) rotates synchronously with the flat shaft section B (203);
the gear A (410) and the gear B (420) are meshed with each other;
the torsion spring (500) is made of spring steel, the torsion spring (500) is sleeved on the torsion spring mounting section (303), and the extending parts at two ends of the torsion spring (500) are respectively positioned in a limiting groove formed in the male hinge (100) and a limiting groove formed in the female hinge (200);
the T-shaped cold-welding-preventing sleeves (600) are made of polytetrafluoroethylene, and two T-shaped cold-welding-preventing sleeves (600) are respectively sleeved on the flat shaft section A (103) and the flat shaft section B (203) and are positioned below the lower mounting plate (302);
the quantity of the annular gaskets (700) is twelve, the annular gaskets are made of polytetrafluoroethylene, two annular gaskets (700) are respectively sleeved on the flat shaft section A (103) and the flat shaft section B (203) and are respectively positioned between the limiting section A (102) and the upper mounting plate (301) and between the limiting section B (202) and the upper mounting plate (301), four annular gaskets (700) are respectively sleeved on the flat shaft section A (103) and the flat shaft section B (203) in pairs and are positioned at two ends of the gear A (410) and the gear B (420), and three groups of six annular gaskets (700) are respectively sleeved on two T-shaped cold-welding-proof sleeves (600);
six disc springs (800) are made of spring steel, and three disc springs are sleeved on the two T-shaped cold-welding-preventing sleeves (600) respectively in a group and are arranged in a staggered mode with annular gaskets (700) sleeved on the T-shaped cold-welding-preventing sleeves (600);
the number of the damping nuts (900) is two, the two damping nuts are respectively installed on the threaded section A (104) and the threaded section B (204), the lower portion of the damping nut (900) is a threaded access section (901), and the upper portion of the damping nut (900) is provided with a press-in section (902).
2. The biaxial solar span opening mechanism of claim 1, wherein: the inner side of the limiting bulge A (101) is an arc transition surface, and the outer side of the arc transition surface is a vertical surface.
3. The biaxial solar span opening mechanism of claim 1, wherein: the section of the limiting section A (102) is larger than that of the flat shaft section A (103).
4. The biaxial solar span opening mechanism of claim 1, wherein: the inner side of the limiting bulge B (201) is an arc transition surface, and the outer side of the arc transition surface is a vertical surface.
5. The biaxial solar span opening mechanism of claim 1, wherein: the section of the limiting section B (202) is larger than that of the flat shaft section B (203).
6. The biaxial solar span opening mechanism of claim 1, wherein: gaps are reserved among the coils of the torsion spring (500).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921702753.1U CN210853000U (en) | 2019-10-12 | 2019-10-12 | Double-shaft solar wing spreading mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921702753.1U CN210853000U (en) | 2019-10-12 | 2019-10-12 | Double-shaft solar wing spreading mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210853000U true CN210853000U (en) | 2020-06-26 |
Family
ID=71308619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921702753.1U Active CN210853000U (en) | 2019-10-12 | 2019-10-12 | Double-shaft solar wing spreading mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210853000U (en) |
-
2019
- 2019-10-12 CN CN201921702753.1U patent/CN210853000U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8757554B1 (en) | Deployable and tracked solar array mechanism for nano-satellites | |
| CN107768797B (en) | Satellite-borne solid surface deployable antenna | |
| CN206634196U (en) | A kind of new unmanned plane | |
| KR20110050799A (en) | Solar power generating device | |
| WO2016169298A1 (en) | Rotary drive device for solar panel | |
| CN210853000U (en) | Double-shaft solar wing spreading mechanism | |
| CN210761377U (en) | Solar wing spreading mechanism with damping adjusting function | |
| CN210592495U (en) | Sun wing spreading mechanism | |
| CN105840647A (en) | Self-locking type hinge and cubic star battery array adopting self-locking type hinge | |
| CN210761376U (en) | Sun wing spreading mechanism | |
| CN103410896A (en) | Locking device of two-dimensional rotating equipment | |
| CN210592496U (en) | Suit pivot formula sun wing opening mechanism | |
| CN210592493U (en) | Sun wing spreading mechanism | |
| CN210707967U (en) | Sun wing spreading mechanism | |
| CN210707968U (en) | Sun wing spreading mechanism | |
| CN102361340B (en) | Solar energy mobile emergency protection power station and method of supplying power to | |
| CN210761374U (en) | Sun wing spreading mechanism | |
| CN108657472B (en) | On-orbit spacecraft internal equipment mounting structure capable of being rapidly detached and turned | |
| CN108657469B (en) | Electric propulsion expansion and thrust direction adjusting mechanism | |
| KR102115993B1 (en) | Solar power generating system | |
| CN210592494U (en) | Connecting rod locking type sun wing unfolding mechanism | |
| CN210707969U (en) | Sun wing spreading mechanism | |
| CN210761375U (en) | Unfolding mechanism for solar wing with stable unfolding process | |
| CN210592492U (en) | Microsatellite solar wing spreading mechanism | |
| CN213661538U (en) | Distributed photovoltaic power station roof mounting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |